gdb/testsuite/gdb.base/siginfo.exp

   1 # Copyright 2004-2024 Free Software Foundation, Inc.
   2
   3 # This program is free software; you can redistribute it and/or modify
   4 # it under the terms of the GNU General Public License as published by
   5 # the Free Software Foundation; either version 3 of the License, or
   6 # (at your option) any later version.
   7 #
   8 # This program is distributed in the hope that it will be useful,
   9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 # GNU General Public License for more details.
  12 #
  13 # You should have received a copy of the GNU General Public License
  14 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15
  16
  17 # The program siginfo.c creates a backtrace containing a signal
  18 # handler registered using sigaction's sa_sigaction / SA_SIGINFO.
  19 # Some OS's (e.g., GNU/Linux) use different signal trampolines for
  20 # sa_sigaction and sa_handler.
  21
  22 # This test first confirms that GDB can backtrace through the
  23 # alternative sa_sigaction signal handler, and second that GDB can
  24 # nexti/stepi out of such a handler.
  25
  26 require {!target_info exists gdb,nosignals}
  27
  28
  29 standard_testfile
  30
  31 if {[prepare_for_testing "failed to prepare" $testfile $srcfile debug]} {
  32     return -1
  33 }
  34
  35 gdb_test "display/i \$pc"
  36
  37 # Advance to main
  38 if {![runto_main]} {
  39     return 0
  40 }
  41
  42 # Pass all the alarms straight through (but verbosely)
  43 # gdb_test "handle SIGALRM print pass nostop"
  44 # gdb_test "handle SIGVTALRM print pass nostop"
  45 # gdb_test "handle SIGPROF print pass nostop"
  46
  47 # Run to the signal handler, validate the backtrace.
  48 gdb_test "break handler"
  49 gdb_test "continue" ".* handler .*" "continue to stepi handler"
  50 gdb_test_sequence "bt" "backtrace for nexti" {
  51     "\[\r\n\]+.0 \[^\r\n\]* handler "
  52     "\[\r\n\]+.1  .signal handler called."
  53     "\[\r\n\]+.2 \[^\r\n\]* main "
  54 }
  55
  56 # Check that GDB can step the inferior back to main
  57 set test "step out of handler"
  58 gdb_test_multiple "step" "${test}" {
  59     -re "Could not insert single-step breakpoint.*$gdb_prompt $" {
  60         setup_kfail gdb/8841 sparc*-*-openbsd*
  61         fail "$test (could not insert single-step breakpoint)"
  62     }
  63     -re "Cannot insert breakpoint.*Cannot access memory.*$gdb_prompt $" {
  64         setup_kfail gdb/8841 "nios2*-*-linux*"
  65         fail "$test (could not insert single-step breakpoint)"
  66     }
  67     -re "done = 1;.*${gdb_prompt} $" {
  68         send_gdb "$i\n"
  69         exp_continue
  70     }
  71     -re "\} .. handler .*${gdb_prompt} $" {
  72         send_gdb "step\n"
  73         exp_continue
  74     }
  75     -re "$inferior_exited_re normally.*${gdb_prompt} $" {
  76         kfail gdb/1613 "$test (program exited)"
  77     }
  78     -re "(while ..done|return 0).*${gdb_prompt} $" {
  79         # After stepping out of a function /r signal-handler, GDB will
  80         # advance the inferior until it is at the first instruction of
  81         # a code-line.  While typically things return to the middle of
  82         # the "while..." (and hence GDB advances the inferior to the
  83         # "return..." line) it is also possible for the return to land
  84         # on the first instruction of "while...".  Accept both cases.
  85         pass "$test"
  86     }
  87 }